相关疑难解决方法(0)

我不太明白之间的差别Task.Wait和await.

我在ASP.NET WebAPI服务中有类似于以下函数:

public class TestController : ApiController
{
    public static async Task<string> Foo()
    {
        await Task.Delay(1).ConfigureAwait(false);
        return "";
    }

    public async static Task<string> Bar()
    {
        return await Foo();
    }

    public async static Task<string> Ros()
    {
        return await Bar();
    }

    // GET api/test
    public IEnumerable<string> Get()
    {
        Task.WaitAll(Enumerable.Range(0, 10).Select(x => Ros()).ToArray());

        return new string[] { "value1", "value2" }; // This will never execute
    }
}

哪里Get会僵局.

什么可能导致这个？当我使用阻塞等待而不是await Task.Delay？时,为什么这不会导致问题？

我试图理解 C# async/await 并观察到这种令人困惑的行为，其中异步方法不执行过去的Task.Delay调用。

考虑以下 -

class Program
{
    static void Main(string[] args)
    {
        Program p = new Program();
        p.MakeBreakfast();
    }

    public async Task MakeBreakfast()
    {
        await BoilWater();
        StartToaster();
        PutTeainWater();
        PutBreadinToaster();
        SpreadButter();
    }

    public async Task BoilWater() { Console.WriteLine("BoilWater start"); await Task.Delay(30); Console.WriteLine("BoilWater end"); }
    public async Task StartToaster() { Console.WriteLine("StartToaster start"); await Task.Delay(1); Console.WriteLine("StartToaster end"); }
    public async Task PutBreadinToaster() { Console.WriteLine("PutBreadinToaster start"); await Task.Delay(2000); Console.WriteLine("PutBreadinToaster end"); }
    public async Task PutTeainWater() { Console.WriteLine("PutTeainWater start"); await Task.Delay(30); …